$ firefox
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
unnamed app(2822) KMimeTypePrivate::ensureXmlDataLoaded: Missing <comment> field in "application/x-msdownload.xml"
unnamed app(2822) KMimeTypePrivate::ensureXmlDataLoaded: Missing <comment> field in "application/x-wine-extension-asa.xml"
unnamed app(2822) KMimeTypePrivate::ensureXmlDataLoaded: Missing <comment> field in "application/x-wine-extension-cdx.xml"
unnamed app(2822) KMimeTypePrivate::ensureXmlDataLoaded: Missing <comment> field in "text/x-component.xml"

(firefox:2729): Gdk-WARNING **: Native Windows wider or taller than 65535 pixels are not supported
KGlobal::locale::Warning your global KLocale is being recreated with a valid main component instead of a fake component, this usually means you tried to call i18n related functions before your main component was created. You should not do that since it most likely will not work
QWidget::insertAction: Attempt to insert null action
QWidget::insertAction: Attempt to insert null action

(firefox:2729): Gdk-WARNING **: Native Windows wider or taller than 65535 pixels are not supported
QWidget::insertAction: Attempt to insert null action
QWidget::insertAction: Attempt to insert null action